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Finding the Fourth Proportional to 57,585.60, 86,372.73 and 20,138.76

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Solution

The fourth proportional to 57,585.60, 86,372.73 and 20,138.76 is: 30,206.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,585.60 : 86,372.73 = 20,138.76 : x
  2. Step 2: Convert to fraction form
    57,585.60/86,372.73 = 20,138.76/x
  3. Step 3: Cross multiply
    57,585.60x = 86,372.73 × 20,138.76
  4. Step 4: Simplify right side
    57,585.60x = 1,739,439,680.01
  5. Step 5: Solve for x
    x = 1,739,439,680.01/57,585.60
  6. Step 6: Final answer
    x = 30,206.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.